Disallow dereferencing deferred handles when generating optimized code.

src/x64/lithium-codegen-x64.h

Index: src/x64/lithium-codegen-x64.h
diff --git a/src/x64/lithium-codegen-x64.h b/src/x64/lithium-codegen-x64.h
index 2fe277f0742231338162f4ea7f14b0cd88ec6d38..887c7889545b98356062bfbbd8d3172c46ee55d6 100644
--- a/src/x64/lithium-codegen-x64.h
+++ b/src/x64/lithium-codegen-x64.h
@@ -234,6 +234,7 @@ class LCodeGen BASE_EMBEDDED {
   // Generate a direct call to a known function.  Expects the function
   // to be in rdi.
   void CallKnownFunction(Handle<JSFunction> function,
+                         int formal_parameter_count,
                          int arity,
                          LInstruction* instr,
                          CallKind call_kind,